Pencil-sharpening device.



No. 658,824. Patented Oct. 2, I900. C BABCOCK. PENCIL SHARPENING DEVICE.

(Application filed Mar. 30, 1900.| (No Model.) 2 Sheets-Sheet IWTNEEEEENo. 658,824. I Patented Oct. 2, I900.

C. BABCOCK.

PENCIL SHABPENING DEVICE.

(Application filed Mar. 80, 1900.1

'2 Sheets-Sheet 2.

(No Modal.)

INVENTUR /w/ m: NORRIS Pzrzns cd. wor mu'mo. wasnmomu, a. c,

follows:

CHARLES BABCOCK,

PATENT OFFICE.

OF SALT LAKE CITY, UTAH, ASSIGNOR 0F ONE-THIRD TO BOYD PARK, OF SAMEPLACE.

PENClL-SHARPENING DEVICE.

SPECIFICATION forming part of Letters Patent No. 658,824, dated October2, 1900.

Application file'd Marcl13b, 1900.

To all whom it may concern:-

Be it known that 1, CHARLES BABCOCK, of Salt Lake City, county of SaltLake, and State of Utah, have invented new and useful .Improvements inPencil-Sharpening Devices, of which the following is a specification.

My invention relates to pencil-'sharpeners; and my improvements uponthisclass of de-' vices have for their object the production of aconstruction whereby they are made more vation of the apparatus with thepencil-holder and its clutch in a position to have a pencil insertedtherein. Fig. 2 is another side elevation of the device with a part ofthe wall by which the working parts are inclosed illustrated asbrokenout. Fig. 3 is a top view of the mechanism. Fig. 4 is a verticalsection taken on the line 00 w of Fig. 3, I

The several parts of the apparatus thus illustrated are designated byletter reference, and the function of the parts is described as Theletter K designates the case in which the mechanism is inclosed andmounted, and

this case has a circular form, having its sides made to taper slightlyinwardly as extendedupwardly. V v

The letter A designates a plate that is transversely arranged within andsecured to the case-walls at 01. a 01, and is preferably constructed tohave a triangular form.

The letter J designates a vertically arranged'bearing formed centrallyin the plate A and in which the cutting mechanism is arranged tojournal. This bearing J is extended downwardly from the bottom of theplate A in a connected tube-form extension 64 as shown at Figs. 2 and l.

The cutting mechanism consists of a disk D, having radially projectedfrom its perimeter a series of cutting-blades B, and which disk isprovided with a shaft S, that is down- Serial No. 10,791. (No model.)

in the under side of the disk D, adapted by I its form and location toreceive the collar of.

Each of the cutting-blades B is at its inner end secured in theperimeter of the disk wheel D, with its cutting edge e projectingdownwardly on an'angle which is acute to the top of the disk wheel D,with the outer ends a of the blades projected upwardly and their uppersurface made slightly concave in cross-section, as indicated at e Theletter 19 designates a pintle-sbaft which is arranged to depend from theunder side of the plate A, and the letter T designates a tube arrangedupon said pintle-shaft and free to turn thereon, said tube beingretained in position on said pintleshaft by a pin 19,passingtransversely through the shaft 19 where the latter extends belowthe end of the tube T, on which pin so placed the lower end of the tubeT rests.

The letter E designates an arm which is rigidly connected to said tube Tand laterally projected therefrom. The letterl designates a pin that isprojected upwardly from the outer end of said arm E, where the upper endof said pin will be in a position to actuate the tube T to bereciprocatinglyrotated on said pintle-shaft as said pin successivelycomes in contact with the blades of the cutting mechanism.

The letter P designates a pawl which at its inner end is connected tothe tube T, and at its outer end the arm of this pawl is arranged topass out of the case through a slot horizontally formed therein, asindicated at 1 As operated by the reciprocation in rotation of the tubeT and the movement of the arm E, this pawl P is actuated to engage withthe perimeter of the ratchet-wheel R on the outer end of thepencil-holderV, and thus actuate the latter to move one tooth each timeone of the blades 13 comes in contact with, so as to move outwardly, thepin 1.

The letter I designates a spring which at its lower end is connected tothe exterior of the tube-form bearing J, and from this connection it ishelically coiled around said hearing, with its outer end attached to thepawl P at 2' against the force of which spring the said pawl is operatedand returned to position after being actuated.

The pencil-holding. mechanism H consists of a tube-form inclosure 71which is secured to and projected from the side of the case K, asindicated at Figs. 1 and 3.

The letter L designates a tube-form shaft which is arranged within thetube-form inclosnre 7L2 and constructed to be rotated therein by meansof the ratchet-wheel R and the pawl P, operated as before described.This tube-form shaft L is retained in place within the inclosure 7L2, inwhich it journals, by means of a groove g, formed to exteriorly encirclesaid tube-form shaft L, and a springpin p, mounted exteriorly upon thetubeform hearing or inclosure h This springpin has a C form arranged toencircle exteriorly part of the tube-form bearing 7L2, with one of itsends attached to the latter and the other free end of the spring partprovided with a pin p, adapted to pass through an opening in thetube-form bearing to enter the groove g, as shown at Fig. 4, thuspermitting the free revolution of the tube-form shaft L, and by theengagement of the pin with the slot g to prevent its outward movement.This tube-form shaft L is slightly expanded at its inner end, asindicated at 01 The letter V designates the pencil-holder proper, and itconsists of a tube which is open at both of its ends, and it is arrangedwithin the tube-form shaft L. The outer end of this pencil-holder properis provided with a series of slits that are extended from the end of theholder inwardly and thereat provided with a lip f. The outer end of thisholder proper is also slit inwardly and is thereat slightly drawninwardly.

The letter O designates a clutch which at c is pivoted to the side ofthe pencil-holder proper where extending outwardly beyond the end of thetube-form shaft L, and the letter 0 designates a cam formed on the innerend of the clutch.

The letter 7L designates the clutch-handle, and which when pulledoutwardly engages with the outer face of the ratchet-wheel R and drawsoutwardly the holder proper,causing its inner slotted end to engage withthe expanded inner end of the tubular shaft L, and thus cause theinwardly-forced end and slotted parts of the holder proper to rigidlygrasp and hold an inserted pencil, aided by the grasping action of theslotted and inturned end parts at the outer end of the holder proper.

The letter N designates a slide-bar which is horizontally placedimmediately beneath the vertical shaft S of the cutting mechanism andupon which bar the lower end of said shaft rests. This slide-bar N isadapted to be moved inwardly and outwardly in slots n and it, formed inthe case sides, with the operating end of this bar N projecting beyondthe case at K The letter 1' designates a spring arranged to encircle thebar N between the wall of the case and the shoulder r formed on the barN, against the resiliency of which the bar N is moved inwardly.

The letter R designates a recess formed in the upper face of the bar N,said recess having the vertical end r and the inwardly and downwardlyinclined end 0* and between these ends the horizontal part 7".

As thus constructed,a pencil being inserted within the holder proper, sothat the end to be sharpened will be over that part of the plate Adesignated at a. in Fig. 3, the clutch is operated to grasp the pencil,as before described. This having been done, the crank is operated toactuate the cutting mechanism, and so soon as the cutting commences thebar N is moved inwardly slowly, while the shaft S is slowly passing downalong the incline T The cutting continues to operate in a plane lowerthan at the start until the bottom end of the shaft S reaches the bottomof the recess R and so soon as the inward pressure upon the bar N ceasesthe spring 0' becomes active to move outwardly the bar N. While thecutting mechanism is being rotated, its blades successively in passingwith each engage with the pin' 1 on the crank-arm E to rotate the tubeT, and thus actuate the pawl P on the latter to operate theratchet-wheel R to rotate the pencil-holder proper.

The blades B are located with reference to the operation of the pawl Pand ratchetwheel B, so that the blades will only cut when the pencil isat one of its periods of rest and the blades'B will only engage with ithe pin l, between the intervals that the blades are cutting.

By having the plates of the cutting mechanism slightly concave on theirupper face and so positioned in the disk-perimeter that their outer endswill project upwardly on an incline, with their cutting edges extendeddownwardly from the plane of their rotation and being operated to outonly when the pencil-holder and pencil are at rest, and then in thedirection of the grain of the wood, the blades by their position andform, as thus described,will give to the pencil-point a conical formthat is slightly concave. As thus constructed the cutting mechanism canbe removed for sharpening the blades when necessary.

As the cutting mechanism herein shown and described would perform thesame function in the same manner in connection with any pencil-holdingmechanism which would operate. the pencil relatively in the same manner,hence I do not limit my invention of the cutting mechanism hereindescribed to its combination with the pencil-holding mechanism which Iillustrate and describe.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a pencil-sharpener the combination with the case K, having in itsside the oppositely-formed slots of, and n; of the plate A, having thedowncast bearing J; the disk D, provided with the blades B, radiallyarranged thereon, and the downwardly-projected shaft S; the bar N,arranged to be moved outwardly and inwardly in the slots in the casesides and provided wit-h the recess R constructed with the inclined side7", and vertical end 0*; and the spring '1 constructed and arranged tobe operated substantially as, and for the purposes set forth.

2. In a pencil-sharpener the combination with the case K, having thetransversely-arranged plate A, provided with the depending bearing J; ofthe disk D, having the blades B, radially arranged on the perimeterthereof, each projected upwardly on an incline and having its cuttingedge arranged to project downwardly, with its shaft S, arranged in thebearing J; the pintle-shaft b depending from the plate A; the tube T,arranged to turn on said pintle-shaft, and provided with thelaterally-extended arm E, having the upwardly-projected pin l; the pawlP, laterally projected from said tube T; and the pencilholding mechanismH, provided with the ratchet-wheel R, constructed and arranged to beoperated substantially as, and for the purposes set forth. a

3. In a pencil-sharpener the combination with a case of a pencil-holderprovided with a pencil-grasping clutch, and arranged within a tube-formshaft provided witha ratchetwheel and constructed to journal in atubeform bearing projected from said case; of a plate horizontallyarranged in said case and provided with a depending bearing; and adepending pintle-shaft; a tube arranged to turn on the latter and havinga laterally-extended arm provided with an upcast pin;

and a pawl laterally projected from said tube whereby to actuate saidratchet-wheel; and a disk provided with radially-arranged blades andhaving a shaft arranged to journal in said depending bearing; saidblades when the disk is rotated being arranged to operate theconnections actuating said pawl, substantially as and for the purposesset forth.

4. The combination with the case K, of the tube 7L2, projected throughthe latter; of the tube-form shaft L, having its inner end expanded; andthe. pencil-holder proper V, arranged within the tube-form shaft, andhaving its ends slit inwardly and its-inner end expanded; and the clutch(Jihavingthe cam 0 and the handle h, and pivoted to said pencil-holderproper, at 0 whereby a pencil inserted within said pencil-holder properis by the combined action of the before-named parts rigidly grasped,substantially as and for the purposes set forth.

5. In a pencil-sharpener the combination with a case, of ahorizontally-arranged plate having a tube-form bearing dependingtherefrom; a wheel having cutting-blades radially projected from itsperimeter, and provid ed with a shaft arranged .to vertically journal insaid depending bearing; a horizontally-arranged bar provided withslideways in the case-walls on which bar the lower end of the shaft ofsaid wheel is supported; and a recess formed in the upper surface ofsaid bar and provided with an incline whereon the shaft and cuttingmechanism may be 0perated to descend and thus cut in a lower planesubstantially as and for the purposes set forth.

Signed at Salt Lake City, Utah, this 12th day of March, 1900, and in thepresence of the two witnesses whose names are hereto written.

CHARLES BABCOOK.

Witnesses:

CHARLES H. BRINK, CHARLES 0. KEY.

